View Code of Problem 51

#include<stdio.h> 
#include<string.h>
#include<math.h>

int main(){ 
    int i,j,n,a[10][10],sum=0;
    scanf("%d",&n);
    for(i=0;i<n;i++)
       for(j=0;j<n;j++)
          scanf("%d",&a[i][j]);
    for(i=0;i<n;i++)
       for(j=0;j<=i;j++){
       	   sum+=a[i][j];
	   }
	printf("%d\n",sum);
    return 0; 
     
}

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